1#!./perl
2
3BEGIN {
4    unless (-d 'blib') {
5	chdir 't' if -d 't';
6	@INC = '../lib';
7	require Config; import Config;
8	keys %Config; # Silence warning
9	if ($Config{extensions} !~ /\bList\/Util\b/) {
10	    print "1..0 # Skip: List::Util was not built\n";
11	    exit 0;
12	}
13    }
14}
15
16use Test::More tests => 6;
17
18use List::Util qw(sum);
19
20my $v = sum;
21is( $v,	undef,	'no args');
22
23$v = sum(9);
24is( $v, 9, 'one arg');
25
26$v = sum(1,2,3,4);
27is( $v, 10, '4 args');
28
29$v = sum(-1);
30is( $v, -1, 'one -1');
31
32my $x = -3;
33
34$v = sum($x, 3);
35is( $v, 0, 'variable arg');
36
37$v = sum(-3.5,3);
38is( $v, -0.5, 'real numbers');
39
40